<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" placeholder="请输入用户名称">
            <template #prefix>
              <el-icon class="el-input__icon"><user-filled /></el-icon>
            </template>
          </el-input>
        </el-form-item>

        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            placeholder="请输入用户密码"
            type="password"
          >
            <template #prefix>
              <div class="el-input__icon">
                <el-icon class="el-input__icon"><lock /></el-icon>
              </div>
            </template>
          </el-input>
        </el-form-item>

        <!-- 按钮区域 -->
        <el-form-item>
          <div class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </div>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import { Edit, Search, Lock, UserFilled } from '@element-plus/icons'
import { getLogin } from '@/network/login'

export default {
  name: 'Login',
  components: {
    Search,
    Edit,
    Lock,
    UserFilled,
  },
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      //   表单的验证规则对象
      loginFormRules: {
        //   验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        //   验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
      loginData: null,
    }
  },
  methods: {
    resetLoginForm() {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    // 登录按钮
    login() {
      // 请求登录验证
      this.getLogin(this.loginForm.username, this.loginForm.password)
    },
    // 发送登录请求
    getLogin(username, password) {
      getLogin(username, password).then((res) => {
        this.loginData = res
        // validate 表单预校验
        this.$refs.loginFormRef.validate((valid) => {
          console.log(valid)
          if (!valid) return
          // console.log(this.loginData.data.meta.status)
          if (this.loginData.data.meta.status != 200)
            return this.$message.error('登录失败')
          this.$message.success('登录成功')
          // 1. 将登录成功之后的token，保存到客户端的sessionStorage中
          // 1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
          // 1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
          window.sessionStorage.setItem('token', this.loginData.data.data.token)
          // console.log(this.loginData.data.data.token)
          // 2. 通过编程式导航跳转到后台主页，路由地址是/home
          this.$router.push('/home')
        })
      })
    },
  },
}
</script>

<style scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border-radius: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
}
.avatar_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #eee;
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
